connection-pool.json

{
  "title": "Connection Pool Monitoring",
  "uid": "gistpin-connection-pool",
  "version": 1,
  "schemaVersion": 38,
  "tags": ["gistpin", "postgresql", "connection-pool"],
  "timezone": "utc",
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "panels": [
    {
      "title": "Active vs Idle Connections",
      "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "sum by (database) (gistpin:pgbouncer_active_connections)",
          "legendFormat": "Active - {{ database }}",
          "refId": "A"
        },
        {
          "expr": "sum by (database) (gistpin:pgbouncer_idle_connections)",
          "legendFormat": "Idle - {{ database }}",
          "refId": "B"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "short",
          "thresholds": {
            "mode": "absolute",
            "steps": [
              { "color": "green", "value": null }
            ]
          }
        },
        "overrides": [
          {
            "matcher": { "id": "byRegexp", "options": "/Active/" },
            "properties": [{ "id": "color", "value": { "mode": "fixed", "fixedColor": "blue" } }]
          },
          {
            "matcher": { "id": "byRegexp", "options": "/Idle/" },
            "properties": [{ "id": "color", "value": { "mode": "fixed", "fixedColor": "green" } }]
          }
        ]
      }
    },
    {
      "title": "Pool Utilization",
      "type": "gauge",
      "gridPos": { "h": 8, "w": 6, "x": 12, "y": 0 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "avg(gistpin:pgbouncer_pool_utilization)",
          "legendFormat": "Average",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "percent",
          "min": 0,
          "max": 100,
          "thresholds": {
            "mode": "absolute",
            "steps": [
              { "color": "green", "value": null },
              { "color": "yellow", "value": 80 },
              { "color": "red", "value": 95 }
            ]
          }
        }
      }
    },
    {
      "title": "Pool Exhaustion Alerts",
      "type": "stat",
      "gridPos": { "h": 8, "w": 6, "x": 18, "y": 0 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "sum(gistpin:pgbouncer_pool_exhausted)",
          "legendFormat": "Exhausted pools",
          "refId": "A"
        },
        {
          "expr": "sum(gistpin:pgbouncer_waiting_clients)",
          "legendFormat": "Waiting clients",
          "refId": "B"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "short",
          "thresholds": {
            "mode": "absolute",
            "steps": [
              { "color": "green", "value": null },
              { "color": "red", "value": 1 }
            ]
          }
        }
      }
    },
    {
      "title": "Connection Wait Times",
      "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "gistpin:pgbouncer_avg_wait_time_seconds",
          "legendFormat": "{{ database }}",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "s",
          "thresholds": {
            "mode": "absolute",
            "steps": [
              { "color": "green", "value": null },
              { "color": "yellow", "value": 0.25 },
              { "color": "red", "value": 0.5 }
            ]
          }
        }
      }
    },
    {
      "title": "Per-Service Connection Breakdown",
      "type": "piechart",
      "gridPos": { "h": 8, "w": 6, "x": 12, "y": 8 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "sum by (database) (gistpin:pgbouncer_active_connections)",
          "legendFormat": "{{ database }}",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "short"
        }
      },
      "options": {
        "pieType": "pie",
        "legend": { "displayMode": "table", "placement": "right" }
      }
    },
    {
      "title": "Connection Churn Rate",
      "type": "timeseries",
      "gridPos": { "h": 8, "w": 6, "x": 18, "y": 8 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "gistpin:pgbouncer_connection_rate_per_second",
          "legendFormat": "{{ database }}",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "cps",
          "thresholds": {
            "mode": "absolute",
            "steps": [
              { "color": "green", "value": null },
              { "color": "yellow", "value": 5 },
              { "color": "red", "value": 10 }
            ]
          }
        }
      }
    },
    {
      "title": "Pool Size vs Usage",
      "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 16 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "gistpin:pgbouncer_pool_size_limit",
          "legendFormat": "Pool limit - {{ database }}",
          "refId": "A"
        },
        {
          "expr": "gistpin:pgbouncer_total_connections",
          "legendFormat": "Total used - {{ database }}",
          "refId": "B"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "short"
        }
      }
    },
    {
      "title": "Auto-Scaling Recommendations",
      "type": "table",
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 16 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [
        {
          "expr": "gistpin:pgbouncer_pool_utilization",
          "format": "table",
          "instant": true,
          "refId": "A"
        }
      ],
      "transformations": [
        {
          "id": "organize",
          "options": {
            "excludeByName": { "Time": true },
            "indexByName": {},
            "renameByName": {
              "database": "Database",
              "Value": "Utilization %"
            }
          }
        },
        {
          "id": "calculateField",
          "options": {
            "mode": "reduceRow",
            "reduce": { "calcs": ["last"] }
          }
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "percent",
          "thresholds": {
            "mode": "absolute",
            "steps": [
              { "color": "green", "value": null },
              { "color": "yellow", "value": 80 },
              { "color": "red", "value": 95 }
            ]
          }
        }
      }
    }
  ],
  "refresh": "30s"
}